IBM System/360 Field Engineering Manual

2250-MODEL 1 GRAPHIC DISPLAY UNIT
Commands
Control
No Operation
Set BAC and Stop
Set Audible Alarm
Insert Cursor O
Set Prog Fen Indicators O
Remove Cursor
Set BAC and Start
Write
Read
Read Direct
Read Buffer
Read Cursor
Read Manual Input
Read X-Y
Sense
Test I/O
Sense
Note: Option Codes - 1 - Buffer
Bit
3 4
0
0
Options
Hex
Required
03
07
OB
OF
1B
IF
27
01
02
02
06
OE
4
12
0 00
0 04
2 - Buffer, Character Generator and A/N Keyboard
3 - Prosrram Function Keyboard
4 - Alpha/Numeric or Program Ftm.ction Keyboard
Summary of Status and Sense Information
!ill
Name
Attention
1, 2 Unused
3
Busy
4
Chan End
Device Ena
Unit Check
Unused
Sense Byte 0
Command Reject
Intervention Required
Bus Out Check
3 Equipment Check
4-7 Unused
Sense Byte 1
Light Pen Detect
End Order Sequence
Character Mode
3-7 Unused
Sense ~yte 2
O, 1, 2 Unused
3-7 Hi-order Buffer Address Ctr
Sense Byte 3
0-5 Lo-order Buffer Address Ctr
6, 7 Unused
Note: Sense byte 2 and 3 will be zero if the buffer is running
when the sense command is issued,
74 S/360 IBM CONFIDENTIAL

IBM System/360 Specifications

General

Brand	IBM
Model	System/360
Category	Desktop
Language	English